US2023057199A1PendingUtilityA1

Optical Imaging Lens Assembly

Assignee: ZHEJIANG SUNNY OPTICS CO LTDPriority: Aug 3, 2021Filed: May 25, 2022Published: Feb 23, 2023

Est. expiryAug 3, 2041(~15 yrs left)· nominal 20-yr term from priority

Inventors:Xiaoxiao Zhu Chen Chen Wuchao Xu Fujian Dai Liefeng Zhao

G02B 13/0045G02B 9/64G02B 13/18G02B 13/06

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References

Claims

Abstract

The disclosure provides an optical imaging lens assembly, which sequentially includes from an object side to an image side along an optical axis: a first lens with a positive refractive power, an object-side surface thereof is a convex surface, and an image-side surface thereof is a concave surface; a second lens with a negative refractive power; a third lens with a refractive power; a fourth lens with a refractive power; a fifth lens with a positive refractive power; a sixth lens with a refractive power; a seventh lens with a positive refractive power; and an eighth lens with a negative refractive power. ImgH is a half of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, ImgH, an entrance pupil diameter (EPD) and a total effective focal length f of the optical imaging lens assembly satisfy: 4.3 mm<ImgH×EPD/f<5.3 mm.

Claims

exact text as granted — not AI-modified

What is claimed is: 
     
         1 . An optical imaging lens assembly, sequentially comprising from an object side to an image side along an optical axis:
 a first lens with a positive refractive power, an object-side surface thereof is a convex surface, and an image-side surface thereof is a concave surface;   a second lens with a negative refractive power;   a third lens with a refractive power;   a fourth lens with a refractive power;   a fifth lens with a positive refractive power;   a sixth lens with a refractive power;   a seventh lens with a positive refractive power; and   an eighth lens with a negative refractive power;   wherein ImgH is a half of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, and ImgH, an entrance pupil diameter (EPD) of the optical imaging lens assembly and a total effective focal length f of the optical imaging lens assembly satisfy: 4.3 mm&lt;ImgH×EPD/f&lt;5.3 mm.   
     
     
         2 . The optical imaging lens assembly according to  claim 1 , wherein an effective focal length f1 of the first lens, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens satisfy: 1.0&lt;(R1+R2)/f1&lt;1.5. 
     
     
         3 . The optical imaging lens assembly according to  claim 1 , wherein an effective focal length f4 of the fourth lens, an effective focal length f2 of the second lens and an effective focal length f8 of the eighth lens satisfy: 0.9&lt;f4/(f2+f8)&lt;1.9. 
     
     
         4 . The optical imaging lens assembly according to  claim 1 , wherein an effective focal length f5 of the fifth lens, an effective focal length f7 of the seventh lens and an effective focal length f3 of the third lens satisfy: 0.7&lt;(f5+f7)/f3&lt;1.8. 
     
     
         5 . The optical imaging lens assembly according to  claim 1 , wherein a curvature radius R5 of an object-side surface of the third lens, a curvature radius R6 of an image-side surface of the third lens, a curvature radius R3 of an object-side surface of the second lens and a curvature radius R4 of an image-side surface of the second lens satisfy: 1.0&lt;(R3+R4)/(R5+R6)&lt;1.5. 
     
     
         6 . The optical imaging lens assembly according to  claim 1 , wherein a curvature radius R13 of an object-side surface of the seventh lens and a curvature radius R14 of an image-side surface of the seventh lens satisfy: 2.0&lt;(R14+R13)/(R14−R13)&lt;2.5. 
     
     
         7 . The optical imaging lens assembly according to  claim 1 , wherein f123 is a combined focal length of the first lens, the second lens and the third lens, and f123, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 5.0&lt;f123/(CT1+CT2+CT3)&lt;7.0. 
     
     
         8 . The optical imaging lens assembly according to  claim 1 , wherein f67 is a combined focal length of the sixth lens and the seventh lens, and f67, a center thickness CT6 of the sixth lens on the optical axis an air space T67 between the sixth lens and the seventh lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis satisfy: 4.2&lt;f67/(CT6+T67+CT7)&lt;6.2. 
     
     
         9 . The optical imaging lens assembly according to  claim 1 , wherein SAG22 is a distance from an intersection point of an image-side surface of the second lens and the optical axis to an effective radius vertex of the image-side surface of the second lens on the optical axis, SAG21 is a distance from an intersection point of an object-side surface of the second lens and the optical axis to an effective radius vertex of the object-side surface of the second lens on the optical axis, SAG32 is a distance from an intersection point of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens on the optical axis, and SAG31 is a distance from an intersection point of an object-side surface of the third lens and the optical axis to an effective radius vertex of the object-side surface of the third lens on the optical axis, and SAG22, SAG21, SAG32 and SAG31 satisfy: 1.2&lt;(SAG21+SAG22)/(SAG31+SAG32)&lt;1.7. 
     
     
         10 . The optical imaging lens assembly according to  claim 1 , wherein a center thickness CT5 of the fifth lens on the optical axis and an edge thickness ET5 of the fifth lens satisfy: 2.3&lt;CT5/ET5&lt;3.8. 
     
     
         11 . The optical imaging lens assembly according to  claim 1 , wherein an edge thickness ET6 of the sixth lens, an edge thickness ET7 of the seventh lens and an edge thickness ET8 of the eighth lens satisfy: 1.2&lt;(ET6+ET8)/(ET7)&lt;2.2. 
     
     
         12 . The optical imaging lens assembly according to  claim 1 , wherein FOV is a maximum field of view of the optical imaging lens assembly, and FOV and the total effective focal length f of the optical imaging lens assembly satisfy: 6.5 mm&lt;f×tan(FOV/2)&lt;7.5 mm. 
     
     
         13 . The optical imaging lens assembly according to  claim 1 , wherein TTL is a distance on the optical axis from the object-side surface of the first lens to the imaging surface of the optical imaging lens assembly, and ImgH and TTL satisfy: 5.0 mm&lt;ImgH×ImgH/TTL&lt;6.0 mm. 
     
     
         14 . An optical imaging lens assembly, sequentially comprising from an object side to an image side along an optical axis:
 a first lens with a positive refractive power, an object-side surface thereof is a convex surface, and an image-side surface thereof is a concave surface;   a second lens with a negative refractive power;   a third lens with a refractive power;   a fourth lens with a refractive power;   a fifth lens with a positive refractive power;   a sixth lens with a refractive power;   a seventh lens with a positive refractive power; and   an eighth lens with a negative refractive power;   wherein FOV is a maximum field of view of the optical imaging lens assembly, and FOV and a total effective focal length f of the optical imaging lens assembly satisfy: 6.5 mm&lt;f×tan(FOV/2)&lt;7.5 mm.   
     
     
         15 . The optical imaging lens assembly according to  claim 14 , wherein an effective focal length f1 of the first lens, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens satisfy: 1.0&lt;(R1+R2)/f1&lt;1.5. 
     
     
         16 . The optical imaging lens assembly according to  claim 14 , wherein an effective focal length f4 of the fourth lens, an effective focal length f2 of the second lens and an effective focal length f8 of the eighth lens satisfy: 0.9&lt;f4/(f2+f8)&lt;1.9. 
     
     
         17 . The optical imaging lens assembly according to  claim 14 , wherein an effective focal length f5 of the fifth lens, an effective focal length f7 of the seventh lens and an effective focal length f3 of the third lens satisfy: 0.7&lt;(f5+f7)/f3&lt;1.8. 
     
     
         18 . The optical imaging lens assembly according to  claim 14 , wherein a curvature radius R5 of an object-side surface of the third lens, a curvature radius R6 of an image-side surface of the third lens, a curvature radius R3 of an object-side surface of the second lens and a curvature radius R4 of an image-side surface of the second lens satisfy: 1.0&lt;(R3+R4)/(R5+R6)&lt;1.5. 
     
     
         19 . The optical imaging lens assembly according to  claim 14 , wherein a curvature radius R13 of an object-side surface of the seventh lens and a curvature radius R14 of an image-side surface of the seventh lens satisfy: 2.0&lt;(R14+R13)/(R14−R13)&lt;2.5. 
     
     
         20 . The optical imaging lens assembly according to  claim 14 , wherein f123 is a combined focal length of the first lens, the second lens and the third lens, and f123, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 5.0&lt;f123/(CT1+CT2+CT3)&lt;7.0.

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